Finishing-die in machines for making kings from sheet metal



UNITED STATES rATENT oEEicE CHARLES w. DIoKINSoN, E NEWARK, NEW JERSEY.

EINISHINe-EIE 1N MACHINES FOR MAKING RINGS rRoM SHEET METAL.

Specification of `Letters Patent No. 11,363, dated VJuly25, 1854.

` To all 'whom it mag/,concemJ i Be it known that I, CHARLES W. DIGKIN`- SON, of Newark, in the county of Essex and State of New Jersey, have` invented certain new and useful Improvements in Machinery for Making Rings or Links from Sheet or Plate Metal; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure l, is a front elevation of a machine constructed according to my invention, with the punch in section. Fig. 2, is a transverse vertical section of thesame in a plane passing through the center of the punch, represented as seen from the left hand of Fig. 1. Fig. 3, is another transversevertical Section taken just within the side framing, represented as seen looking from the opposite Side to Fig. vl, and showingthe linishing dies in section, inthe act. of finishing a ring. Fig. 4, is a plan of the `lower dies and the discharging mechanism. Fig. 5, is a vertical section of the punch and its die. Fig. 6, is a side view of the finishing dies,iand the discharging mechanism. Fig; '-T, is a section of a finished ring on a scale larger `than the suitable form from `the she'et or plate, punches a hole therein, and partly gives the` desired form to the ring by means of one set of dies and punches, `and then finishes it by other dies and discharges it.

My invention relates to the construction and operation of the lower finishing die for the purpose of discharging the finished ring or link. p To enable those skilled in they art to make i and use my inventionI will proceed to describe its construction and operation.

The working parts of the machine are all supported by a framing composed of a bedplate, A, standards, B, B, and `crosspieces C, C, whichmay be cast separate and bolted together, or all cast together. The movements of theparts are all given by a shaft, D, resting in bearings at the top of the standards, and receiving a constant rotary slide.

motion. The first operation to be performed, is that `of cutting out a `flat circular piece of plate, like that shown in Figs. 8 and 9, and the punch (a.) `for that purpose `is attached to a vertical Slide,` E, working in suitable guides in the framing near the left hand side of the machine, the bottom die (12), in connection with which the punch acts,being in the bedplate. The punch (a), is fitted to the slide in any suitable' manner so as to leave a cavity above it within the slide, and itis bored out tothe size of the largest part of the exterior of the nished ring, and counterbored at the upper or back part to a larger size to form a shoulder. In the center of the punchr (a) is placed `the small punch (CZ) for punching a hole in the center of the circular plate which is cut 1 by vthe larger punch (a). The punch (d) is secured in that part of the slide, E, at the back o r `abo-ve the recess (c) and its upper `part is slightly enlarged to form` fa shoulder. Its face o-r ends stands at some distance above the face or end lof the larger punch.` The Within the lower dief) which receives the punch (a)` there is an internal die (g) whose interior `receives the punch (d) and whose exterior is cylindricaland of such size as to enter the cavity in the punch (a) and leave room all around it for the thickness of the metal to form. the ring. The

face of the `die (g) is the reverse of the die 6 The punches (a) (d) upper die (c) and 1 lower dies (b) (g)` bring the metal to the form shown in sect-ion in Fig. l0, and the punches and upper die are caused to receive' the necessary movements for that purpose by the following mea-ns: The slideis'forced i downward by means of a wiper on the driving shaft acting upon acurved vibrating bar attached to the back Side of the This bal which is Vmoved forward by the action of the wiper causes the pressure on the slide to increase gradually and Y the exterior of the internal bottom die (g) to a cup form, as shown in Fig. 2, before the small punch (CZ) comes into operation to hole has been punched by the small punch the shoulder on the upper part of the said punch, by its contact with the loose collar (f), forces down the die (e) for the' purpose of giving a finish to the curved upper side of the ring, between the said die and the bottom die The ring havy tact with the underside of a broad tongue on the back side of a rod (m) which is secured to the front of the slide and lifts the slide, which is supported by the said wipers, and afterward by the wiper acting on the same tongue, until a stud t (o) on the right side of the slide is caught by the projecting rim (n) of a cam, G, on the shaft, by which the slide is held up until just before the proper time for the punches to act again. The 'ring remains within the punch (d) as the latter rises with the slide until the slide has been raised to its highest position, by which time the die plate,H, containing the lower finishing die,

The ring is expelled from the punch by a slight downward motion of the die (e) which is produced by a forked arm (p) on the lower end of j a vertical rod, I, which slides in bearings at the right side of 'the slide. rIhis forked armenters through a slot in the side of the slide, into the cavity (c) and its prongs pass-one on each side of the upper part of the small punch (CZ) and when the rod, I, is forced down, as it is at the proper time, by the exterior of the cam, Gr, the arm forces the collar (f) down on the die (e) and depresses it. The rod, I, except at the proper time for the ,expulsion of the ring from the punch, is heldup by a spring (r).

The finishing dies are placed the lower one (s, s) in the plate, I-I, and the upper one ,(t)`inia vertical slide, J, arranged at some distance from the slide, E. The plate, I-I, is attached to a bent lever, K, whose fulcrum is a vertical shaft, L, supported in suitable bearings, on the framing. At the upper end of the shaft, L, there is an arm with which the side of the cam, G,

comes in contact, and upon which the said cam, assisted by a spring (fw) attached to .the lever, K, operates so as to give the lever, .K, such a motion as to carry the dle plate,

I-I, and lower finishing die from a position directly under the punches (a) (cl) to one Adirectly under the upper finishing die (t) lor vice versa. punch the hole in the center, and after the The lower finishing die has in its center a short mandrel (1') which stands up just `:high enough to pass through the hole which 'has been made in the ring by the punch (el), ias sho-wn in Fig. 1, and around this mandrel .1 is a concave recess, of a form exactly the revverse of the form desired to be given to the 1lower side of the ring. die is bored a short dist-ance up to receive 4'the end of the mandrel (r) and around this .bore itsform is exactly the reverse of the ffinished upper sideof the ring. Its slide, J, receives a downwardl motion at the proper time, to finish the ring, from a wiper (a) on the driving shaft, which acts upon a vifbrating bar (j) attached to the slide, and

The upper finishing acting in a similar manner t0 the bar on the slide, E, and as the ring is finished to support it, takes place immediately after the lower finishing die has received the partly finished ring, and as soon as the ring lis brought under the die (t) the latter de- .scends, and its pressure causes' the lower .edges to be crowded into the concavity of the die (s, s) and to be so contracted as to t closely around the mandrel (fr) like the upper part of the ring.

has been moved under vit to receive the ring as represented in Fig. l.

In order to allow the finished ring to be :easily expelled from the lower finishing die, the latter die is made in two parts, the back part (s) beingy firmly secured in the die plate, and t-he front part (s), (see Fig. whose external form is that of half a cylinder, fitting easily in a recess of similar form Ain the die plate and having a recess at its `center to allow it to move up and down in 'its place, independently of. the mandrel (1').

the framing, and it has a tendency to spring toward the center of the die, but it `is to a certain extent prevented by the guide piece, though, as it occupies an oblique position,

this tendency is allowed toexert itself as the slide, J, and top die descend. During the enough to clear the top of the mandrel (1),

when, being unsupported on the back side, it falls over on an inclined plane, V, which is placed immediately behind the dies, and by the inclined plane is conducted to any suitable receptacle. The part (s) of the die is prevented rising too high by a guard `piece (y) and is forced down again to its place by the act of depositing the next partly finished ring upon it.

The metal from which the rings are made is introduced to the machine in strips of a width a trifle greater than the diameter of the circular pieces to be cut out, as in coining presses, and in order to move the strip exactly the proper distance, I employ a feeding hook, O, which catches the edges of the holes which have been already made by punching the strip. This hook is attached to a horizontal shaft Q, which receives a rocking motion by being connected by an arm R, with a vertical rod, S, which is alternately depressed by a cam, T, 0n the main shaft and raised by a spring, U.

The use to which this machine is particularly applicable is the manufacture of links for watch chains, and their manufacture is not limited to the form represented, as by varying the shape of the dies and punches the form of the links may be varied.

Two rings or links are always under operation at the same time, one being punched and partly formed by the punches (a) (CZ), top die (e) and bottom dies (b) (g) simultaneously with the finishing of that cut out and partly formed by the preceding movement of the' said punches, &c.

What I claim as my invention, and desire to secure by Letters Patent, is-

Forming the lower finishing die in two parts, of which the part (s) is capable of being raised substantially as herein described, to expel the finished ring or link.

CHARLES w. DIcKiNsoN.

Witnesses:

S. H. WALES, O. D. MUNN. 

